Transcript for Alleged Disability Fraudster Caught on ‘Price Is Right’

Turning to outrageous stories of fraud. People who claim they had injuries collecting workers compensation. Living high until they got caught. Cathy Caswell, come on down. Reporter: A fortune in cash and prices isn't the only thing Ka Cathy collected. She was claiming an on-the-job shoulder injury made her unable to stand, run, reach or grasp. Good luck. Reporter: But there she is, spinning that big, heavy wheel. Not once, but twice. Caswell is one of the countless people accused of faking an injury to collect on disability payments. Experts estimate bogus claims cost taxpayers hundreds of millions of dollars a year. And questionable claims, up 24%. People like Valerie, a bus driver who claimed a severe shoulder injury prevented her from getting behind the wheel. Investigators caught her on camera, behind the drums. Later, she pleaded guilty to fraud. It takes a secret agent of sorts to catch injury imposters in the act. I love James bond. Reporter: And nobody does it better than chicago-based private eye, bob keen. His targets often try to evade detection. But once caught red-handed by our master of disguise, they often settle their cases. He's claiming limited to no use of his left arm. Reporter: And to that, you say -- Busted. Reporter: What do you have to do to pull this off? The best way and only way of beating the system is completely staying in your house for three to five years because anything you do outside of that, and we're there. We're going to get it. Reporter: For "Good morning America," Cecilia Vega, ABC news, Los Angeles.

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